enter image description hereI assume something forward looking; not sure why there and how they got this to play nicely with radar

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    $\begingroup$ Is this the only photo you have of it? It looks like a birdstrike from here. $\endgroup$ Commented Jul 8, 2020 at 23:20
  • $\begingroup$ why was there a military bloke standing around at fedex ? $\endgroup$
    – Fattie
    Commented Jul 9, 2020 at 13:09
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    $\begingroup$ @Fattie I believe that is the governor of New Hampshire, Chris Sununu, speaking, likely receiving a shipment of medical supplies to fight COVID. (Based on the seal on the podium, and a quick google search for the NH governor and extrapolating to current events.) The uniformed officer is probably part of the National Guard or maybe his protection detail. This is just a guess though. $\endgroup$ Commented Jul 9, 2020 at 13:31
  • $\begingroup$ thanks for that @DarrelHoffman $\endgroup$
    – Fattie
    Commented Jul 9, 2020 at 13:56

1 Answer 1


It's the infrared sensor for the Enhanced Flight Vision System (EFVS).

From FedEx Newsroom June 23, 2008:

FedEx Express is the first major commercial carrier in the airline industry to receive a Supplemental Type Certificate from the FAA for the advanced system, authorizing its installation in the company’s fleet of Boeing MD-10 freighters. The company’s goal for the system is to improve the level of flight safety by increasing visibility of pilots during adverse weather conditions and darkness.

A unique application of Honeywell International “Head Up Display” (HUD) technology combined with infrared “Enhanced Flight Vision System” (EFVS) technology of Elbit Systems of America Commercial Aviation-Kollsman Business Unit, positions the system as the leader in the avionic visual technologies market.

The Honeywell HUD interfaces with aircraft navigational and flight data systems in presenting a high resolution liquid crystal display of critical flight guidance information. This is overlaid with real-time EFVS infrared video of the outside world that is displayed in an overhead unit in the captain’s forward field of view using state-of-the-art HUD “combiner” technology. Elbit Systems Ltd., Electro-Optics-Elop manufactures the combiner glass.

The combined image appears like this:

Source: FedEx

  • $\begingroup$ I was wondering, is that a "your head moves and it tracks your head/eyeballs and paints appropriately" type of HUD, or is it the type where you "have to keep your head in the correct spot" ?? $\endgroup$
    – Fattie
    Commented Jul 9, 2020 at 13:08
  • $\begingroup$ It's a fixed combiner glass. The pilot adjusts the seat to put their head within the 'eyebox' so that the projected image aligns with the outside world. It does not try to track the pilot's head or eyes. $\endgroup$
    – Gerry
    Commented Jul 9, 2020 at 13:13
  • $\begingroup$ thanks for that explanation, good one $\endgroup$
    – Fattie
    Commented Jul 9, 2020 at 13:57
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    $\begingroup$ @Fattie, HUDs have, generally, been properly aligning with the outside, passively without tracking anything, since their beginnings as reflector sights in 1900! The mechanism is fairly simple: the display is projected to infinity using lenses and the adjusted image reflected off a half-mirror that is the screen. That way the image is properly aligned from anywhere it is visible, so the pilot just needs to keep their head in appropriate range, but not exact spot. $\endgroup$
    – Jan Hudec
    Commented Jul 9, 2020 at 19:09
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    $\begingroup$ @Fattie, … note that the collimator is needed so that both the real world in the distance and the HUD image are seen sharp by the pilot. If the pilot was just looking through a semi-transparent display, they'd either see the distant objects sharply or the display sharply, but not both at the same time as one would be out of focus. This is fixed by projecting the image to infinity – with the nice bonus of providing the alignment. $\endgroup$
    – Jan Hudec
    Commented Jul 9, 2020 at 19:13

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